The OKR series plug-in relays (4 timed contacts) are based on the POK relay platform. They are designed and built with materials and solutions that give them excellent endurance and robustness specifications:

- These components are suitable for use in harsh operating environments and when subjected to severe thermal shocks.

One-shot function: Pulse time adjustable via a potentiometer from 0.1 seconds to 60 minutes. Switching time adjustment from 10 to 100% of full scale. Equipped with magnetic blow-out, these relays guarantee high effectiveness in the interruption of DC loads. The common contact is mounted on a separate return device, comprising a flexible blade designed to ensure uniform pressure on the break contacts. The excellent electrical and mechanical performance of these relays allows them to be used in the most demanding mains, such as:

- Control and signalling functions in power stations

- High-voltage and medium voltage substations

- Rail transport

- Industries with production processes operating in continuous mode.

Exceptional resistance to shock and vibration, ideal for use on rolling stock. High immunity to electromagnetic disturbances typical of high-voltage substations.

Compliance with standards

• EN 61810-1, EN 61810-2, EN 61810-7 Electromechanical elementary relays
• EN 61812-1 Time relays
• EN 60695-2-10 Fire hazard testing
• EN 50082-2, EN 61000-4 Electromagnetic compatibility
• EN 60529 Degrees of protection provided by enclosures
• EN 60077 Electric equipment for rolling stock - General service conditions and general rules
• EN 50155 Electronic equipment used on rolling stock
• EN 61373 Shock and vibration tests, category 1, class B
• EN 45545-2 Requirements for fire behaviour of materials and components - Product No. EL10 - Requirement R26, V0
• ASTM E162, E662 Standard test method for surface flammability of materials; Standard test method for specific optical density of smoke

• Plug-in relays with one-shot function
• 4 time-delay contacts, 5 A
• Time setting from 0.1s to 60 minutes using a potentiometer
• Excellent resistance to shock and vibration
• Transparent cover equipped with an extraction handle
• Numerous configuration and customization options
• Wide choice of associated bases and locking springs

To fully meet your expectations, a range of accessories is available that is compatible with your equipment. Feel free to add them to your quote request to obtain a complete and tailored solution.